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1. P.031 SMILES: Sunnybrook-St. Michael’s Integrated Leadership/QI in Endovascular Stroke care – enhancing hyperacute stroke protocols for optimized door-to-intervention times

Author: Notario, L, primary, Liu, AM, additional, Chin, H, additional, Im, M, additional, Zhuo, S, additional, Lumban, A, additional, Simec, R, additional, Abalos, J, additional, Montgomery, K, additional, Fertuck, T, additional, Lee, J, additional, Convery, C, additional, Lazo, K, additional, McMillan, L, additional, Hawkes, CM, additional, and Khosravani, H, additional
Published: 2024
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2. Erratum: Measurement of the absolute branching fractions for Ds- → - νt¯ion of the decay constant fDs (Physical Review D - Particles, Fields, Gravitation and Cosmology (2010) 82 (091103))

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Published: 2015

3. The BaBar detector: Upgrades, operation and performance

Author: Aubert, B, Barate, R, Boutigny, D, Couderc, F, del Amo Sanchez, P, Gaillard, J-M, Hicheur, A, Karyotakis, Y, Lees, JP, Poireau, V, Prudent, X, Robbe, P, Tisserand, V, Zghiche, A, Grauges, E, Tico, J Garra, Lopez, L, Martinelli, M, Palano, A, Pappagallo, M, Pompili, A, Chen, GP, Chen, JC, Qi, ND, Rong, G, Wang, P, Zhu, YS, Eigen, G, Stugu, B, Sun, L, Abrams, GS, Battaglia, M, Borgland, AW, Breon, AB, Brown, DN, Button-Shafer, J, Cahn, RN, Charles, E, Clark, AR, Day, CT, Furman, M, Gill, MS, Groysman, Y, Jacobsen, RG, Kadel, RW, Kadyk, JA, Kerth, LT, Kolomensky, Yu G, Kral, JF, Kukartsev, G, LeClerc, C, Levi, ME, Lynch, G, Merchant, AM, Mir, LM, Oddone, PJ, Orimoto, TJ, Osipenkov, IL, Pripstein, M, Roe, NA, Romosan, A, Ronan, MT, Shelkov, VG, Suzuki, A, Tackmann, K, Tanabe, T, Wenzel, WA, Zisman, M, Barrett, M, Bright-Thomas, PG, Ford, KE, Harrison, TJ, Hart, AJ, Hawkes, CM, Knowles, DJ, Morgan, SE, O'Neale, SW, Penny, RC, Smith, D, Soni, N, Watson, AT, Watson, NK, Goetzen, K, Held, T, Koch, H, Kunze, M, Lewandowski, B, Pelizaeus, M, Peters, K, Schmuecker, H, Schroeder, T, Steinke, M, Fella, A, Antonioli, E, Boyd, JT, Chevalier, N, Cottingham, WN, Foster, B, Mackay, C, and Walker, D
Subjects: General-purpose detector for colliding beams, Operational experience, High-luminosity storage ring operation, Ream monitoring, physics.ins-det, hep-ex, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Other Physical Sciences, Nuclear & Particles Physics
Abstract: The BaBar detector operated successfully at the PEP-II asymmetric e +e- collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the detector systems, as well as the trigger, online and offline computing, and aspects of event reconstruction since the beginning of data taking. © 2013 Elsevier B.V.
Published: 2013

4. Observation and study of the baryonic B-meson decays B→D

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Flanigan, JM, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, and Verderi, M
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present results for B-meson decay modes involving a charm meson, protons, and pions using 455×106 BB̄ pairs recorded by the BaBar detector at the SLAC PEP-II asymmetric-energy e +e - collider. The branching fractions are measured for the following ten decays: B ̄0→D0pp̄, B ̄0→D *0pp̄, B ̄0→D +pp̄π -, B ̄0→D *+pp̄π -, B -→D0pp̄π -, B -→D *0pp̄π -, B ̄0→D0pp̄π -π +, B ̄0→D *0pp̄π -π +, B -→D +pp̄π -π -, and B -→D *+pp̄π -π -. The four B - and the two five-body B ̄0 modes are observed for the first time. The four-body modes are enhanced compared to the three- and the five-body modes. In the three-body modes, the M(pp̄) and M(D(*)0p) invariant-mass distributions show enhancements near threshold values. In the four-body mode B ̄0→D +pp̄π -, the M(pπ -) distribution shows a narrow structure of unknown origin near 1.5GeV/c2. The distributions for the five-body modes, in contrast to the others, are similar to the expectations from uniform phase-space predictions. © 2012 American Physical Society.
Published: 2012

5. Observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ).

Author: Sanchez, P del Amo, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, General Physics, Physical Sciences, Mathematical Sciences, Engineering
Abstract: We report the observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) based on 342 fb(-1) of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+ e- storage rings at SLAC. A simultaneous fit to three D(s)(+) decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) with a significance greater than 5 standard deviations (including systematic uncertainties) and measure its branching fraction to be B(B- → D(s)((*)+) K- ℓ- ν(ℓ)) = [6.13(-1.03)(+1.04)(stat)±0.43(syst)±0.51(B(D(s)))]×10(-4), where the last error reflects the limited knowledge of the D(s) branching fractions.
Published: 2011

6. Observation of the Decay B-→Ds(*)+K-ℓ-ν¯ℓ

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: We report the observation of the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) based on 342 fb(-1) of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+ e- storage rings at SLAC. A simultaneous fit to three D(s)(+) decay chains is performed to extract the signal yield from measurements of the squared missing mass in the B meson decay. We observe the decay B- → D(s)((*)+) K- ℓ- ν(ℓ) with a significance greater than 5 standard deviations (including systematic uncertainties) and measure its branching fraction to be B(B- → D(s)((*)+) K- ℓ- ν(ℓ)) = [6.13(-1.03)(+1.04)(stat)±0.43(syst)±0.51(B(D(s)))]×10(-4), where the last error reflects the limited knowledge of the D(s) branching fractions.
Published: 2011

7. Observation of ηc(1S) and ηc(2S) decays to K+K-π+π-π0 in two-photon interactions

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: We study the processes γγ→KS0K±π and γγ→K+K-π+π -π0 using a data sample of 519.2fb-1 recorded by the BABAR detector at the PEP-II asymmetric-energy e+e- collider at center-of-mass energies near the Υ(nS) (n=2, 3, 4) resonances. We observe the ηc(1S), χc0(1P) and ηc(2S) resonances produced in two-photon interactions and decaying to K+K-π+π-π0, with significances of 18.1, 5.4 and 5.3 standard deviations (including systematic errors), respectively, and report 4.0σ evidence of the χc2(1P) decay to this final state. We measure the ηc(2S) mass and width in KS0K±π decays, and obtain the values m(ηc(2S))=3638.5±1.5±0.8MeV/c2 and Γ(ηc(2S))=13.4±4.6±3.2MeV, where the first uncertainty is statistical and the second is systematic. We measure the two-photon width times branching fraction for the reported resonance signals, and search for the χc2(2P) resonance, but no significant signal is observed. © 2011 American Physical Society.
Published: 2011

8. Search for the decay B0→γγ

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report the result of a search for the rare decay B0→γγ in 426fb-1 of data, corresponding to 226×106 B0B ̄0 pairs, collected on the Υ(4S) resonance at the PEP-II asymmetric-energy e+e- collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 21-12+13 signal events with a statistical significance of 1.8σ. This corresponds to a branching fraction B(B0→γγ)=(1.7±1.1(stat.) ±0.2(syst.))×10-7. Based on this result, we set a 90% confidence level upper limit of B(B0→γγ)
Published: 2011

9. Study of B→πlν and B→ρlν decays and determination of

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, and Schubert, KR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present an analysis of exclusive charmless semileptonic B-meson decays based on 377×106 BB̄ pairs recorded with the B A BAR detector at the Υ(4S) resonance. We select four event samples corresponding to the decay modes B0→π-ℓ+ν, B +→π0ℓ+ν, B0→ρ -ℓ+ν, and B+→ρ0ℓ +ν and find the measured branching fractions to be consistent with isospin symmetry. Assuming isospin symmetry, we combine the two B→πℓν samples, and similarly the two B→ρℓν samples, and measure the branching fractions B(B0→π -ℓ+ν)=(1.41±0.05±0.07)×10 -4 and B(B0→ρ-ℓ+ν)=(1. 75±0.15±0.27)×10-4, where the errors are statistical and systematic. We compare the measured distribution in q2, the momentum transfer squared, with predictions for the form factors from QCD calculations and determine the Cabibbo-Kobayashi-Maskawa matrix element |V ub|. Based on the measured partial branching fraction for B→πℓν in the range q2
Published: 2011

10. Measurement of the B→D̄()D()K branching fractions

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a measurement of the branching fractions of the 22 decay channels of the B0 and B+ mesons to D̄(*)D(*)K, where the D(*) and D̄(*) mesons are fully reconstructed. Summing the 10 neutral modes and the 12 charged modes, the branching fractions are found to be B(B0→D̄(*)D(*)K)=(3.68±0. 10±0.24)% and B(B+→D̄(*)D(*)K)=(4. 05±0.11±0.28)%, where the first uncertainties are statistical and the second systematic. The results are based on 429fb-1 of data containing 471×106BB̄ pairs collected at the Υ(4S) resonance with the BABAR detector at the SLAC National Accelerator Laboratory. © 2011 American Physical Society.
Published: 2011

11. Studies of τ-→ηK-ντ and τ-→ηπ-ντ at BABAR and a search for a second-class current

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report on analyses of tau lepton decays τ -→ηK-ντ and τ-→ηπ-ντ, with η→π+π-π0, using 470fb-1 of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the Υ(4S) resonance. We measure the branching fraction for the τ-→ηK-ντ decay mode, B(τ-→ηK-ντ)=(1.42±0. 11(stat)±0.07(syst))×10-4, and report a 95% confidence level upper limit for the second-class current process τ -→ηπ-ντ, B(τ-→ηπ-ντ)
Published: 2011

12. Observation of the Y1/3D/J bottomonium state through decays to n+n Y1s

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: Based on 122×106Υ(3S) events collected with the BABAR detector, we have observed the Υ(13DJ) bottomonium state through the Υ(3S)→γγΥ(13DJ) →γγπ⊃+π⊃-Υ(1S) decay chain. The significance for the J=2 member of the Υ(13DJ) triplet is 5.8 standard deviations including systematic uncertainties. The mass of the J=2 state is determined to be 10164.5±0.8(stat)±0.5(syst)MeV/c2. We use the π⊃+π⊃- invariant mass distribution to confirm the consistency of the observed state with the orbital angular momentum assignment of the Υ(13DJ). Copyright © 2010 American Physical Society.
Published: 2010

13. Search for the rare decay B→Kνν̄

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a search for the rare decays B⊃+→K⊃+νν̄ and B0→K0νν̄ using 459×106 BB̄ pairs collected with the BABAR detector at the SLAC National Accelerator Laboratory. Flavor-changing neutral-current decays such as these are forbidden at tree level but can occur through one-loop diagrams in the standard model (SM), with possible contributions from new physics at the same order. The presence of two neutrinos in the final state makes identification of signal events challenging, so reconstruction in the semileptonic decay channels B→D(⊃*)lν of the B meson recoiling from the signal B is used to suppress backgrounds. We set an upper limit at the 90% confidence level (CL) of 1.3×10⊃-5 on the total branching fraction for B⊃+→K⊃+νν̄, and 5.6×10⊃-5 for B0→K0νν̄. We additionally report 90% CL upper limits on partial branching fractions in two ranges of dineutrino mass squared for B⊃+→K⊃+νν̄. © 2010 The American Physical Society.
Published: 2010

14. Observation of new resonances decaying to Dπ and D*π in inclusive e+e- collisions near s=10.58 GeV

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: We present a study of the D⊃+π⊃-, D0π⊃+, and D⊃*⊃+π⊃- systems in inclusive e⊃+e⊃-→cc̄ interactions in a search for new excited D meson states. We use a data set, consisting of ∼454fb⊃-1, collected at center-of-mass energies near 10.58 GeV by the B?>A?>B?>AR?> detector at the SLAC PEP-II asymmetric-energy collider. We observe, for the first time, candidates for the radial excitations of the D0, D⊃*0, and D⊃*⊃+, as well as the L=2 excited states of the D0 and D⊃+, where L is the orbital angular momentum of the quarks. © 2010 The American Physical Society.
Published: 2010

15. Observation of the Υ(13DJ) bottomonium state through decays to π+π-Υ(1S)

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: Based on 122×106Υ(3S) events collected with the BABAR detector, we have observed the Υ(13DJ) bottomonium state through the Υ(3S)→γγΥ(13DJ) →γγπ⊃+π⊃-Υ(1S) decay chain. The significance for the J=2 member of the Υ(13DJ) triplet is 5.8 standard deviations including systematic uncertainties. The mass of the J=2 state is determined to be 10164.5±0.8(stat)±0.5(syst)MeV/c2. We use the π⊃+π⊃- invariant mass distribution to confirm the consistency of the observed state with the orbital angular momentum assignment of the Υ(13DJ). Copyright © 2010 American Physical Society.
Published: 2010

16. Observation of new resonances decaying to Dπ and D⊃*π in inclusive e⊃+e⊃- collisions near √s=10.58GeV

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a study of the D⊃+π⊃-, D0π⊃+, and D⊃*⊃+π⊃- systems in inclusive e⊃+e⊃-→cc̄ interactions in a search for new excited D meson states. We use a data set, consisting of ∼454fb⊃-1, collected at center-of-mass energies near 10.58 GeV by the B?>A?>B?>AR?> detector at the SLAC PEP-II asymmetric-energy collider. We observe, for the first time, candidates for the radial excitations of the D0, D⊃*0, and D⊃*⊃+, as well as the L=2 excited states of the D0 and D⊃+, where L is the orbital angular momentum of the quarks. © 2010 The American Physical Society.
Published: 2010

17. Search for B+→D+K0 and B+→D +K*0 decays

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report a search for the rare decays B+→D+K0 and B+→D+K*0 in an event sample of approximately 465×106 BB̄ pairs collected with the B A B AR detector at the PEP-II asymmetric-energy e+e- collider at SLAC National Accelerator Laboratory. We find no significant evidence for either mode and we set 90% probability upper limits on the branching fractions of B(B +→D+K0)
Published: 2010

18. Measurement of the absolute branching fractions for D-s(-) -> l(-) (nu)over-bar(l) and extraction of the decay constant f(Ds)

Author: Sanchez, P del Amo, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics
Published: 2010

19. Measurement of the absolute branching fractions for Ds-→ℓ -ν̄ℓ and extraction of the decay constant fDs

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, West, C, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: hep-ex, Brain Disorders, Down Syndrome, Intellectual and Developmental Disabilities, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: The absolute branching fractions for the decays Ds-→ℓ -ν̄ℓ (ℓ=e, μ, or τ) are measured using a data sample corresponding to an integrated luminosity of 521fb -1 collected at center-of-mass energies near 10.58 GeV with the BABAR detector at the PEP-II e+e- collider at SLAC. The number of Ds- mesons is determined by reconstructing the recoiling system DKXγ in events of the type e+e-→DKXDs*-, where Ds*-→Ds-γ and X represents additional pions from fragmentation. The Ds-→ℓ-νℓ events are detected by full or partial reconstruction of the recoiling system DKXγℓ. The branching fraction measurements are combined to determine the Ds- decay constant fD s=(258.6±6.4±7.5)MeV, where the first uncertainty is statistical and the second is systematic. © 2010 The American Physical Society.
Published: 2010

20. Correlated leading baryon-antibaryon production in e⊃+e⊃- →cc̄→Λc+Λ̄c-X

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Buchanan, C, Hartfiel, BL, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, and Nauenberg, U
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a study of 649±35 e⊃+e⊃-→cc̄ events produced at √s±10.6GeV containing both a Λc+ baryon and a Λ̄c- antibaryon. The number observed is roughly 4 times that expected if the leading charmed hadron types are uncorrelated, confirming an observation by the CLEO Collaboration. We find a 2-jet topology in these events but very few additional baryons, demonstrating that the primary c and c̄ are predominantly contained in a correlated baryon-antibaryon system. In addition to the charmed baryons we observe on average 2.6±0.2 charged intermediate mesons, predominantly pions, carrying 65% of the remaining energy.© 2010 The American Physical Society.
Published: 2010

21. Search for B⊃+ meson decay to a1+(1260)K⊃*0(892)

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, Playfer, S, and Watson, JE
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a search for the decay B⊃+→a1+(1260)K⊃*0(892) . The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represent 465×106BB̄ pairs produced in e⊃+e⊃- annihilation at the energy of the Υ(4S). We find no significant signal and set an upper limit at 90% confidence level on the product of branching fractions B(B⊃+→a1+(1260)K⊃*0(892))×B(a1+(1260) →π⊃+π⊃-π⊃+) of 1.8×10⊃-6. © 2010 The American Physical Society.
Published: 2010

22. Search for B+→D+K0 and B+→D+K*0 decays

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: We report a search for the rare decays B+→D+K0 and B+→D+K*0 in an event sample of approximately 465×106 BB̄ pairs collected with the B A B AR detector at the PEP-II asymmetric-energy e+e- collider at SLAC National Accelerator Laboratory. We find no significant evidence for either mode and we set 90% probability upper limits on the branching fractions of B(B +→D+K0)
Published: 2010

23. Search for fJ(2220) in Radiative J/ψ Decays

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: We present a search for f(J)(2220) production in radiative J/ψ→γf(J)(2220) decays using 460 fb⁻¹ of data collected with the BABAR detector at the SLAC PEP-II e(+)e⁻ collider. The f(J)(2220) is searched for in the decays to K(+)K⁻ and K(S)⁰K(S)⁰. No evidence of this resonance is observed, and 90% confidence level upper limits on the product of the branching fractions for J/ψ→γf(J)(2220) and f(J)(2220)→K(+)K⁻(K(S)⁰K(S)⁰) as a function of spin and helicity are set at the level of 10⁻⁵, below the central values reported by the Mark III experiment.
Published: 2010

24. Search for b→u transitions in B-→DK- and D*K- decays

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, Mckenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report results from an updated study of the suppressed decays B-→DK- and B-→D*K- followed by D→K+π-, where D(*) indicates a D(*)0 or a D̄(*)0 meson, and D*→Dπ0 or D*→Dγ. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity triangle angle γ due to interference between the b→c transition B-→D(*)0K- followed by the doubly Cabibbo-suppressed decay D0→K+π-, and the b→u transition B-→D̄(*)0K- followed by the Cabibbo-favored decay D̄0→K+π-. We also report an analysis of the decay B-→D(*)π- with the D decaying into the doubly Cabibbo-suppressed mode D→K+π-. Our results are based on 467×106 Υ(4S) →BB̄ decays collected with the BABAR detector at SLAC. We measure the ratios R(*) of the suppressed ([K+π-]DK-/π-) to favored ([K-π+]DK-/π-) branching fractions as well as the CP asymmetries A(*) of those modes. We see indications of signals for the B-→DK- and B-→DDπ0*K- suppressed modes, with statistical significances of 2.1 and 2.2σ, respectively, and we measure: R DK=(1.1±0.6±0.2)×10-2,ADK=-0. 86±0.47-0.16+0.12, R(Dπ0)K*=(1.8±0.9±0.4) ×10-2,A(Dπ0)K*=+0.77±0.35±0.12,R(Dγ)K*= (1.3±1.4±0.8)×10-2,A(Dγ)K*=+0.36±0.94-0. 41+0.25, where the first uncertainty is statistical and the second is systematic. We use a frequentist approach to obtain the magnitude of the ratio rB|A(B-→D̄0K-)/A(B-→D0K-)|=(9.5-4.1+5.1)%, with r B
Published: 2010

25. Measurement of CP observables in B±→DCPK± decays and constraints on the CKM angle γ

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: Using the entire sample of 467×106 Υ(4S)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at the SLAC National Accelerator Laboratory, we perform an analysis of B±→DK± decays, using decay modes in which the neutral D meson decays to either CP-eigenstates or non-CP-eigenstates. We measure the partial decay rate charge asymmetries for CP-even and CP-odd D final states to be A CP+=0.25±0.06±0.02 and ACP-=-0.09±0. 07±0.02, respectively, where the first error is the statistical and the second is the systematic uncertainty. The parameter ACP+ is different from zero with a significance of 3.6 standard deviations, constituting evidence for direct CP violation. We also measure the ratios of the charged-averaged B partial decay rates in CP and non-CP decays, RCP+=1.18±0. 09±0.05 and RCP-=1.07±0.08±0.04. We infer frequentist confidence intervals for the angle γ of the unitarity triangle, for the strong phase difference δB, and for the amplitude ratio rB, which are related to the B-→DK- decay amplitude by rBei(δB-γ)=A(B-→D̄0K-)/ A(B-→D0K-). Including statistical and systematic uncertainties, we obtain 0.24
Published: 2010

26. Exclusive production of Ds+Ds-, Ds+Ds-, and Ds+Ds*- via e+e- annihilation with initial-state radiation

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, ES, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Vaccine Related, Brain Disorders, Emerging Infectious Diseases, Prevention, Intellectual and Developmental Disabilities, Down Syndrome, Biodefense, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We perform a study of exclusive production of Ds+Ds-, Ds*+Ds-, and Ds*+Ds*- final states in initial-state-radiation events from e +e- annihilations at a center-of-mass energy near 10.58 GeV, to search for charmonium 1- states. The data sample corresponds to an integrated luminosity of 525fb-1 and was recorded by the BABAR experiment at the PEP-II storage ring. The Ds+Ds-, Ds*+Ds-, and Ds*+Ds*- mass spectra show evidence of the known ψ resonances. Limits are extracted for the branching ratios of the decays X(4260)→Ds (*)+Ds(*). © 2010 The American Physical Society.
Published: 2010

27. Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle γ with B∓→D()K()∓ Decays

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to K(S)(0) π+ π- and K(S)(0) K+ K- produced in the processes B∓ → DK∓, B∓ D* K∓ with D* → Dπ(0), Dγ, and B∓ → DK*∓ with K*∓ → K(S)(0) π∓, using 468 million BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We measure γ = (68 ± 14 ± 4 ± 3)° (modulo 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with γ = 0 (no direct CP violation) with a significance of 3.5 standard deviations.
Published: 2010

28. Evidence for direct CP violation in the measurement of the Cabbibo-Kobayashi-Maskawa angle γ with B∓ → D()K()∓ decays.

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through a Dalitz plot analysis of neutral D-meson decays to K(S)(0) π+ π- and K(S)(0) K+ K- produced in the processes B∓ → DK∓, B∓ D* K∓ with D* → Dπ(0), Dγ, and B∓ → DK*∓ with K*∓ → K(S)(0) π∓, using 468 million BB pairs collected by the BABAR detector at the PEP-II asymmetric-energy e+ e- collider at SLAC. We measure γ = (68 ± 14 ± 4 ± 3)° (modulo 180°), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with γ = 0 (no direct CP violation) with a significance of 3.5 standard deviations.
Published: 2010

29. Study of B→Xγ decays and determination of

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: Using a sample of 471×106 BB̄ events collected with the BABAR detector, we study the sum of seven exclusive final states B→X s(d)γ, where Xs(d) is a strange (nonstrange) hadronic system with a mass of up to 2.0GeV/c2. After correcting for unobserved decay modes, we obtain a branching fraction for b→dγ of (9.2±2.0(stat)±2.3(syst))×10⊃-6 in this mass range, and a branching fraction for b→sγ of (23.0±0.8(stat)±3. 0(syst))×10⊃-5 in the same mass range. We find B(b→dγ) B(b→sγ)=0.040±0.009(stat)±0.010(syst), from which we determine |Vtd/Vts|=0.199±0.022(stat)±0. 024(syst)±0.002(th). © 2010 The American Physical Society.
Published: 2010

30. Observation of the decay B̄0→Λc+p̄π0

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: In a sample of 467×106 BB̄ pairs collected with the BABAR detector at the PEP-II collider at SLAC we have observed the decay B̄0→Λc+p̄π0 and measured the branching fraction to be (1.94±0.17±0.14±0.50)×10-4, where the uncertainties are statistical, systematic, and the uncertainty on the Λc+→pK-π+ branching fraction, respectively. We determine an upper limit of 1.5×10-6 at 90% C.L. for the product branching fraction B(B̄0→Σc+(2455)p̄) ×B(Λc+→pK-π+). Furthermore, we observe an enhancement at the threshold of the invariant mass of the baryon-antibaryon pair. © 2010 The American Physical Society.
Published: 2010

31. Measurement of D0-D¯0 Mixing Parameters Using D0→KS0π+π- and D0→KS0K+K- Decays

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: We report a direct measurement of D0-D0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D(0) → K(S)(0) π+ π- and, for the first time, D0 → K(S)(0)K+ K- decays. The low-momentum pion π(s)(+) in the decay D*+ → D0 π(s)(+) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e+ e- colliding-beam data recorded near square root(s)=10.6 GeV by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 ± 2.3(stat) ± 1.2(syst) ± 0.8(model)] × 10(-3), and y = [5.7 ± 2.0(stat) ± 1.3(syst) ± 0.7(model)] × 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.
Published: 2010

32. Measurement of D0-D0 mixing parameters using D0 → K(S)(0)π+ π- and D0 → K(S)(0)K+ K- decays.

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, and Playfer, S
Subjects: BABAR Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: We report a direct measurement of D0-D0 mixing parameters through a time-dependent amplitude analysis of the Dalitz plots of D(0) → K(S)(0) π+ π- and, for the first time, D0 → K(S)(0)K+ K- decays. The low-momentum pion π(s)(+) in the decay D*+ → D0 π(s)(+) identifies the flavor of the neutral D meson at its production. Using 468.5 fb(-1) of e+ e- colliding-beam data recorded near square root(s)=10.6 GeV by the BABAR detector at the PEP-II asymmetric-energy collider at SLAC, we measure the mixing parameters x = [1.6 ± 2.3(stat) ± 1.2(syst) ± 0.8(model)] × 10(-3), and y = [5.7 ± 2.0(stat) ± 1.3(syst) ± 0.7(model)] × 10(-3). These results provide the best measurement to date of x and y. The knowledge of the value of x, in particular, is crucial for understanding the origin of mixing.
Published: 2010

33. Observation of the rare decay B0→KS0K±π

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, and Schubert, KR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report an analysis of charmless hadronic decays of neutral B mesons to the final state KS0K±π, using a data sample of (465±5)×106 BB̄ events collected with the BABAR detector at the Υ(4S) resonance. We observe an excess of signal events with a significance of 5.2 standard deviations including systematic uncertainties and measure the branching fraction to be B(B0→KS0K±π)=(3. 2±0.5±0.3)×10-6, where the uncertainties are statistical and systematic, respectively. © 2010 The American Physical Society.
Published: 2010

34. Measurements of Charged Current Lepton Universality and |Vus| Using Tau Lepton Decays to e-ν¯eντ, μ-ν¯μντ, π-ντ, and K-ντ

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Fulsom, BG, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: Using 467 fb(-1) of e+e- annihilation data collected with the BABAR detector, we measure (B(τ- → μ- ν(μ) ν(τ)))/(B(τ- → e- ν(e) ν(τ))) =(0.9796±0.0016±0.0036), (B(τ- → π- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.5945±0.0014±0.0061), and (B(τ- → K- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.03882±0.00032±0.00057), where the uncertainties are statistical and systematic, respectively. From these precision τ measurements, we test the standard model assumption of μ-e and τ-μ charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.
Published: 2010

35. B-meson decays to η′ρ, η′f0, and η′K*

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Penzkofer, A, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, and Clark, PJ
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present measurements of B-meson decays to the final states η′ρ, η′f0, and η′K*, where K* stands for a vector, scalar, or tensor strange meson. We observe a significant signal or evidence for η′ρ+ and all the η′K* channels. We also measure, where applicable, the charge asymmetries, finding results consistent with no direct CP violation in all cases. The measurements are performed on a data sample consisting of 467×106 BB̄ pairs, collected with the BABAR detector at the PEP-II e+e- collider at the SLAC National Accelerator Laboratory. Our results favor the theoretical predictions from perturbative QCD and QCD factorization and we observe an enhancement of the tensor K2*(1430) with respect to the vector K*(892) component. © 2010 The American Physical Society.
Published: 2010

36. Measurements of charged current lepton universality and |Vus| using tau lepton decays to e- ν(e) ν(τ), μ- ν(μ) ν(τ), π- ν(τ), and K- ν(τ).

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Fulsom, BG, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: BABAR Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: Using 467 fb(-1) of e+e- annihilation data collected with the BABAR detector, we measure (B(τ- → μ- ν(μ) ν(τ)))/(B(τ- → e- ν(e) ν(τ))) =(0.9796±0.0016±0.0036), (B(τ- → π- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.5945±0.0014±0.0061), and (B(τ- → K- ν(τ)))/(B(τ- → e- ν(e) ν(τ))) = (0.03882±0.00032±0.00057), where the uncertainties are statistical and systematic, respectively. From these precision τ measurements, we test the standard model assumption of μ-e and τ-μ charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.
Published: 2010

37. Evidence for the decay X(3872)→J/ψω

Author: Del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, Schubert, KR, Schwierz, R, Bernard, D, Verderi, M, Clark, PJ, Playfer, S, and Watson, JE
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a study of the decays B0,+→J/ ψπ+π-π0K0,+, using 467×106 BB̄ pairs recorded with the BABAR detector. We present evidence for the decay mode X(3872)→J/ψω, with product branching fractions B(B+→X(3872)K+)×B(X(3872)→J/ ψω)=[0.6±0.2(stat)±0.1(syst)]×10-5, and B(B0→X(3872)K0)×B(X(3872)→J/ψω)=[0.6±0.3(stat) ±0.1(syst)]×10-5. A detailed study of the π+π-π0 mass distribution from X(3872) decay favors a negative-parity assignment. © 2010 The American Physical Society.
Published: 2010

38. Limits on τ lepton-flavor violating decays into three charged leptons

Author: Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Feltresi, E, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, and Wacker, K
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: A search for the neutrinoless, lepton-flavor violating decay of the τ lepton into three charged leptons has been performed using an integrated luminosity of 468fb-1 collected with the BABAR detector at the PEP-II collider. In all six decay modes considered, the numbers of events found in data are compatible with the background expectations. Upper limits on the branching fractions are set in the range (1.8-3.3)×10-8 at 90% confidence level. © 2010 The American Physical Society.
Published: 2010

39. Observation of the χc2(2P) meson in the reaction γγ→ DD̄ at BABAR

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: A search for the Z(3930) resonance in γγ production of the DD̄ system has been performed using a data sample corresponding to an integrated luminosity of 384fb-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̄ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2++); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD̄) is found to be (0.24±0.05±0.04)keV. © 2010 The American Physical Society.
Published: 2010

40. Test of lepton universality in Υ(1S) decays at BABAR.

Author: del Amo Sanchez, P, Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, Wacker, K, Kobel, MJ, and Schubert, KR
Subjects: BABAR Collaboration, General Physics, Physical Sciences, Mathematical Sciences, Engineering
Abstract: The ratio R(τμ)(Υ(1S))=Γ(Υ(1S)→τ+ τ-)/Γ(Υ(1S)→μ+ μ-) is measured using a sample of (121.8±1.2)×10(6)Υ(3S) events recorded by the BABAR detector. This measurement is intended as a test of lepton universality and as a search for a possible light pseudoscalar Higgs boson. In the standard model (SM) this ratio is expected to be close to 1. Any significant deviations would violate lepton universality and could be introduced by the coupling to a light pseudoscalar Higgs boson. The analysis studies the decays Υ(3S)→Υ(1S)π+ π-, Υ(1S)→l+ l-, where l=μ, τ. The result, R(τμ)(Υ(1S))=1.005±0.013(stat)±0.022(syst), shows no deviation from the expected SM value, while improving the precision with respect to previous measurements.
Published: 2010

41. Observation of the χc2(2P) meson in the reaction γγ→DD¯ at BABAR

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: A search for the Z(3930) resonance in γγ production of the DD̄ system has been performed using a data sample corresponding to an integrated luminosity of 384fb-1 recorded by the BABAR experiment at the PEP-II asymmetric-energy electron-positron collider. The DD̄ invariant mass distribution shows clear evidence of the Z(3930) state with a significance of 5.8σ. We determine mass and width values of (3926.7±2. 7±1.1)MeV/c2 and (21.3±6.8±3.6)MeV, respectively. A decay angular analysis provides evidence that the Z(3930) is a tensor state with positive parity and C parity (JPC=2++); therefore we identify the Z(3930) state as the χc2(2P) meson. The value of the partial width Γγγ×B(Z(3930)→DD̄) is found to be (0.24±0.05±0.04)keV. © 2010 The American Physical Society.
Published: 2010

42. Search for Charged Lepton Flavor Violation in Narrow Υ Decays

Author: Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Feltresi, E, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, and Wacker, K
Subjects: BABAR Collaboration, Mathematical Sciences, Physical Sciences, Engineering, General Physics
Abstract: Charged-lepton flavor-violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99x10(6)Upsilon(2S) decays and 117x10(6)Upsilon(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions B(Upsilon(nS)-->e(+/-)tau(-/+)) and B(Upsilon(nS)-->mu(+/-)tau(-/+)) (n=2,3) at the 10(-6) level and use these results to place lower limits of order 1 TeV on the mass scale of charged-lepton flavor-violating effective operators.
Published: 2010

43. Search for charged lepton flavor violation in narrow upsilon decays.

Author: Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Feltresi, E, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, and Wacker, K
Subjects: BABAR Collaboration, General Physics, Mathematical Sciences, Physical Sciences, Engineering
Abstract: Charged-lepton flavor-violating processes are unobservable in the standard model, but they are predicted to be enhanced in several extensions to the standard model, including supersymmetry and models with leptoquarks or compositeness. We present a search for such processes in a sample of 99x10(6)Upsilon(2S) decays and 117x10(6)Upsilon(3S) decays collected with the BABAR detector. We place upper limits on the branching fractions B(Upsilon(nS)-->e(+/-)tau(-/+)) and B(Upsilon(nS)-->mu(+/-)tau(-/+)) (n=2,3) at the 10(-6) level and use these results to place lower limits of order 1 TeV on the mass scale of charged-lepton flavor-violating effective operators.
Published: 2010

44. Measurement of the γγ*→ηc transition form factor

Author: Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Feltresi, E, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, and Wacker, K
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We study the reaction e+e-→e+e -ηc, ηc→KSK±π" and obtain ηc mass and width values 2982.2±0.4±1.6MeV/c2 and 31.7±1.2±0.8MeV, respectively. We find Γ(ηc→γ γ)B(ηc→KK̄π)=0.374±0.009±0.031keV, and measure the γγ*→ηc transition form factor in the momentum transfer range from 2 to 50GeV2. The analysis is based on 469fb-1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV. © 2010 The American Physical Society.
Published: 2010

45. Search for B+→ℓ+νℓrecoiling against B-→ℓ-ν̄X

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a search for the decay B+→ℓ +νℓ(ℓ=τ,μ,ore) in (458.9±5.1)×106 BB̄ pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B-meson is reconstructed as B-→D0ℓ -ν̄X. Using the method of Feldman and Cousins, we obtain B(B+→τ+ντ)=(1.7±0.8±0.2) ×10-4, which excludes zero at 2.3σ. We interpret the central value in the context of the standard model and find the B meson decay constant to be fB2=(62±31)×103MeV2. We find no evidence for B +→e+νe and B+→μ+ν μ and set upper limits at the 90% C.L. B(B+→e +νe)
Published: 2010

46. Measurement of branching fractions of B decays to K1(1270)π and K1(1400)π and determination of the CKM angle α from B0→a1(1260)± π

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report measurements of the branching fractions of neutral and charged B meson decays to final states containing a K1(1270) or K1(1400) meson and a charged pion. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, correspond to 454×106 BB̄ pairs produced in e+e- annihilation. We measure the branching fractions B(B0→K1(1270)+π-+K1(1400) +π -)=3.1-0.7+0.8×10-5 and B(B+→ K1(1270) 0π++K1(1400) 0π+)=2.9-1.7+2.9×10 -5 (
Published: 2010

47. Search for B+→ℓ+νℓ recoiling against B-→D0ℓ-ν¯X

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, J Garra, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics
Abstract: We present a search for the decay B+→ℓ +νℓ(ℓ=τ,μ,ore) in (458.9±5.1)×106 BB̄ pairs recorded with the BABAR detector at the PEP-II B-factory. We search for these B decays in a sample of B+B- events where one B-meson is reconstructed as B-→D0ℓ -ν̄X. Using the method of Feldman and Cousins, we obtain B(B+→τ+ντ)=(1.7±0.8±0.2) ×10-4, which excludes zero at 2.3σ. We interpret the central value in the context of the standard model and find the B meson decay constant to be fB2=(62±31)×103MeV2. We find no evidence for B +→e+νe and B+→μ+ν μ and set upper limits at the 90% C.L. B(B+→e +νe)
Published: 2010

48. Measurement of the gamma gamma* -> eta c transition form factor

Author: Lees, JP, Poireau, V, Prencipe, E, Tisserand, V, Garra Tico, J, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, Yu G, Lynch, G, Osipenkov, IL, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, Yu I, Solodov, EP, Todyshev, K Yu, Yushkov, AN, Bondioli, M, Curry, S, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Richman, JD, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Hitlin, DG, Ongmongkolkul, P, Porter, FC, Rakitin, AY, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, Wagner, SR, Ayad, R, Toki, WH, Feltresi, E, Hauke, A, Jasper, H, Karbach, TM, Merkel, J, Petzold, A, Spaan, B, and Wacker, K
Subjects: hep-ex, Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We report a measurement of the process gamma gamma* --> pi0 with a 759fb^{-1} data sample recorded with the Belle detector at the KEKBasymmetric-energy e+e- collider. The pion transition form factor, F(Q^2), ismeasured for the kinematical region 4 GeV^2
Published: 2010

49. Measurement and interpretation of moments in inclusive semileptonic decays B̄→Xc -ν̄

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, JG, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Fulsom, BG, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Abachi, S, Buchanan, C, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Zhang, L, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Wang, L, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Piatenko, T, Porter, FC, Andreassen, R, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, and Nauenberg, U
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present results for the moments of observed spectra in inclusive semileptonic B-meson decays to charm hadrons B̄→Xc -ν̄. Moments of the hadronic-mass and the combined mass-and-energy spectra for different minimum electron or muon momenta between 0.8 and 1.9GeV/c are obtained from a sample of 232×106 Υ(4S)→BB̄ events, collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We also present a reevaluation of the moments of electron-energy spectra and partial decay fractions B(B̄→Xce-ν̄) for minimum electron momenta between 0.6 and 1.5GeV/c based on a sample of 51×106 Υ(4S)→BB̄ events. The measurements are used for the extraction of the total decay fraction, the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vcb|, the quark masses mb and mc, and four heavy-quark QCD parameters in the framework of a Heavy-Quark Expansion (HQE). We find B(B̄→Xc -ν̄)= (10.64±0.17±0.06)% and |Vcb|=(42.05±0.45±0.70) ×10-3. © 2010 The American Physical Society.
Published: 2010

50. Observation of inclusive D*± production in the decay of Υ(1S)

Author: Aubert, B, Karyotakis, Y, Lees, JP, Poireau, V, Prencipe, E, Prudent, X, Tisserand, V, Tico, JG, Grauges, E, Martinelli, M, Palano, A, Pappagallo, M, Eigen, G, Stugu, B, Sun, L, Battaglia, M, Brown, DN, Hooberman, B, Kerth, LT, Kolomensky, YG, Lynch, G, Osipenkov, IL, Tackmann, K, Tanabe, T, Hawkes, CM, Soni, N, Watson, AT, Koch, H, Schroeder, T, Asgeirsson, DJ, Hearty, C, Mattison, TS, McKenna, JA, Barrett, M, Khan, A, Randle-Conde, A, Blinov, VE, Bukin, AD, Buzykaev, AR, Druzhinin, VP, Golubev, VB, Onuchin, AP, Serednyakov, SI, Skovpen, YI, Solodov, EP, Todyshev, KY, Bondioli, M, Curry, S, Eschrich, I, Kirkby, D, Lankford, AJ, Lund, P, Mandelkern, M, Martin, EC, Stoker, DP, Atmacan, H, Gary, JW, Liu, F, Long, O, Vitug, GM, Yasin, Z, Sharma, V, Campagnari, C, Hong, TM, Kovalskyi, D, Mazur, MA, Richman, JD, Beck, TW, Eisner, AM, Heusch, CA, Kroseberg, J, Lockman, WS, Martinez, AJ, Schalk, T, Schumm, BA, Seiden, A, Winstrom, LO, Cheng, CH, Doll, DA, Echenard, B, Fang, F, Hitlin, DG, Narsky, I, Ongmongkolkul, P, Piatenko, T, Porter, FC, Andreassen, R, Dubrovin, MS, Mancinelli, G, Meadows, BT, Mishra, K, Sokoloff, MD, Bloom, PC, Ford, WT, Gaz, A, Hirschauer, JF, Nagel, M, Nauenberg, U, Smith, JG, and Wagner, SR
Subjects: Nuclear & Particles Physics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Atomic, Molecular, Nuclear, Particle and Plasma Physics
Abstract: We present a study of the inclusive D*± production in the decay of Υ(1S) using (98.6±0.9)×106 Υ(2S) mesons collected with the BABAR detector at the Υ(2S) resonance. Using the decay chain Υ(2S)→π+π-Υ(1S), Υ(1S)→D*±X, where X is unobserved, we measure the branching fraction B[Υ(1S)→D*±X]=(2. 52±0.13(stat)±0.15(syst))% and the D*± momentum distribution in the rest frame of the Υ(1S). We find evidence for an excess of D*± production over the expected rate from the virtual photon annihilation process Υ(1S)→γ *→cc̄→D*±X. © 2010 The American Physical Society.
Published: 2010

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